I've installed the WASCE plug-in for WASCE v2.1.8. I start my server and attempt to deploy a war to it and get this error:
Distribution of module failed. See log for details.
Cound not open module file: C:\DOCUME~1\xxxxxx\LOCALS~1\Temp\geronimo-deployer2058598442755689448.tmpdir\wasce-tony-dynamic-web.war
org.apache.geronimo.common.DeploymentException: Cound not open module file: C:\DOCUME~1\xxxxxx\LOCALS~1\Temp\geronimo-deployer2058598442755689448.tmpdir\wasce-tony-dynamic-web.war
at org.apache.geronimo.deployment.Deployer.getModule(Deployer.java:450)
at org.apache.geronimo.deployment.Deployer.deploy(Deployer.java:219)
at org.apache.geronimo.deployment.Deployer.deploy(Deployer.java:134)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.apache.geronimo.gbean.runtime.ReflectionMethodInvoker.invoke(ReflectionMethodInvoker.java:34)
at org.apache.geronimo.gbean.runtime.GBeanOperation.invoke(GBeanOperation.java:124)
at org.apache.geronimo.gbean.runtime.GBeanInstance.invoke(GBeanInstance.java:867)
at org.apache.geronimo.kernel.basic.BasicKernel.invoke(BasicKernel.java:239)
at org.apache.geronimo.kernel.KernelGBean.invoke(KernelGBean.java:342)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:600)
at org.apache.geronimo.gbean.runtime.ReflectionMethodInvoker.invoke(ReflectionMethodInvoker.java:34)
at org.apache.geronimo.gbean.runtime.GBeanOperation.invoke(GBeanOperation.java:124)
at org.apache.geronimo.gbean.runtime.GBeanInstance.invoke(GBeanInstance.java:867)
at org.apache.geronimo.kernel.basic.BasicKernel.invoke(BasicKernel.java:239)
at org.apache.geronimo.system.jmx.MBeanGBeanBridge.invoke(MBeanGBeanBridge.java:172)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)
at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427)
at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265)
at java.security.AccessController.doPrivileged(AccessController.java:284)
at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1367)
at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788)
at sun.reflect.GeneratedMethodAccessor118.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:600)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:310)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(AccessController.java:284)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:736)
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:139)
at java.util.jar.JarFile.<init>(JarFile.java:138)
at java.util.jar.JarFile.<init>(JarFile.java:102)
at org.apache.geronimo.deployment.util.DeploymentUtil.createJarFile(DeploymentUtil.java:254)
at org.apache.geronimo.deployment.Deployer.getModule(Deployer.java:448)
... 41 more
The same issue occurs using Spring STS, version 3.1 (same version of Eclipse - 4.2.1). The issue does not occur however on STS 2.9.1 (Eclipse 3.8.1).

I've confirmed the temp dir exists and has plenty of space and no file-write permission errors.